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ef368dac NC |
1 | /* call_graph.c - Create call graphs. |
2 | ||
3 | Copyright (C) 2000 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GNU Binutils. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
21 | \f | |
252b5132 RH |
22 | #include "cg_arcs.h" |
23 | #include "call_graph.h" | |
24 | #include "corefile.h" | |
25 | #include "gmon_io.h" | |
26 | #include "gmon_out.h" | |
27 | #include "symtab.h" | |
28 | #include "sym_ids.h" | |
29 | ||
30 | extern void | |
31 | DEFUN (cg_tally, (from_pc, self_pc, count), | |
32 | bfd_vma from_pc AND bfd_vma self_pc AND unsigned long count) | |
33 | { | |
34 | Sym *parent; | |
35 | Sym *child; | |
36 | ||
37 | parent = sym_lookup (&symtab, from_pc); | |
38 | child = sym_lookup (&symtab, self_pc); | |
39 | ||
40 | if (child == NULL || parent == NULL) | |
41 | return; | |
42 | ||
43 | /* If we're doing line-by-line profiling, both the parent and the | |
44 | child will probably point to line symbols instead of function | |
45 | symbols. For the parent this is fine, since this identifies the | |
46 | line number in the calling routing, but the child should always | |
47 | point to a function entry point, so we back up in the symbol | |
48 | table until we find it. | |
49 | ||
50 | For normal profiling, is_func will be set on all symbols, so this | |
51 | code will do nothing. */ | |
252b5132 RH |
52 | while (child >= symtab.base && ! child->is_func) |
53 | --child; | |
54 | ||
55 | if (child < symtab.base) | |
56 | return; | |
57 | ||
ef368dac NC |
58 | /* Keep arc if it is on INCL_ARCS table or if the INCL_ARCS table |
59 | is empty and it is not in the EXCL_ARCS table. */ | |
252b5132 RH |
60 | if (sym_id_arc_is_present (&syms[INCL_ARCS], parent, child) |
61 | || (syms[INCL_ARCS].len == 0 | |
62 | && !sym_id_arc_is_present (&syms[EXCL_ARCS], parent, child))) | |
63 | { | |
64 | child->ncalls += count; | |
65 | DBG (TALLYDEBUG, | |
66 | printf (_("[cg_tally] arc from %s to %s traversed %lu times\n"), | |
67 | parent->name, child->name, count)); | |
68 | arc_add (parent, child, count); | |
69 | } | |
70 | } | |
71 | ||
ef368dac NC |
72 | /* Read a record from file IFP describing an arc in the function |
73 | call-graph and the count of how many times the arc has been | |
74 | traversed. FILENAME is the name of file IFP and is provided | |
75 | for formatting error-messages only. */ | |
252b5132 | 76 | |
252b5132 RH |
77 | void |
78 | DEFUN (cg_read_rec, (ifp, filename), FILE * ifp AND CONST char *filename) | |
79 | { | |
80 | bfd_vma from_pc, self_pc; | |
81 | struct gmon_cg_arc_record arc; | |
82 | unsigned long count; | |
83 | ||
84 | if (fread (&arc, sizeof (arc), 1, ifp) != 1) | |
85 | { | |
86 | fprintf (stderr, _("%s: %s: unexpected end of file\n"), | |
87 | whoami, filename); | |
88 | done (1); | |
89 | } | |
ef368dac | 90 | |
252b5132 RH |
91 | from_pc = get_vma (core_bfd, (bfd_byte *) arc.from_pc); |
92 | self_pc = get_vma (core_bfd, (bfd_byte *) arc.self_pc); | |
93 | count = bfd_get_32 (core_bfd, (bfd_byte *) arc.count); | |
94 | DBG (SAMPLEDEBUG, | |
95 | printf ("[cg_read_rec] frompc 0x%lx selfpc 0x%lx count %lu\n", | |
fdcf7d43 | 96 | (unsigned long) from_pc, (unsigned long) self_pc, count)); |
ef368dac | 97 | /* Add this arc: */ |
252b5132 RH |
98 | cg_tally (from_pc, self_pc, count); |
99 | } | |
100 | ||
ef368dac NC |
101 | /* Write all the arcs in the call-graph to file OFP. FILENAME is |
102 | the name of OFP and is provided for formatting error-messages | |
103 | only. */ | |
252b5132 | 104 | |
252b5132 RH |
105 | void |
106 | DEFUN (cg_write_arcs, (ofp, filename), FILE * ofp AND const char *filename) | |
107 | { | |
108 | const unsigned char tag = GMON_TAG_CG_ARC; | |
109 | struct gmon_cg_arc_record raw_arc; | |
110 | Arc *arc; | |
111 | Sym *sym; | |
112 | ||
113 | for (sym = symtab.base; sym < symtab.limit; sym++) | |
114 | { | |
115 | for (arc = sym->cg.children; arc; arc = arc->next_child) | |
116 | { | |
117 | put_vma (core_bfd, arc->parent->addr, (bfd_byte *) raw_arc.from_pc); | |
118 | put_vma (core_bfd, arc->child->addr, (bfd_byte *) raw_arc.self_pc); | |
119 | bfd_put_32 (core_bfd, arc->count, (bfd_byte *) raw_arc.count); | |
120 | if (fwrite (&tag, sizeof (tag), 1, ofp) != 1 | |
121 | || fwrite (&raw_arc, sizeof (raw_arc), 1, ofp) != 1) | |
122 | { | |
123 | perror (filename); | |
124 | done (1); | |
125 | } | |
126 | DBG (SAMPLEDEBUG, | |
127 | printf ("[cg_write_arcs] frompc 0x%lx selfpc 0x%lx count %lu\n", | |
fdcf7d43 ILT |
128 | (unsigned long) arc->parent->addr, |
129 | (unsigned long) arc->child->addr, arc->count)); | |
252b5132 RH |
130 | } |
131 | } | |
132 | } |